Since there are now two witnesses evidencing working in two different 4.12 environments, I added relevant label to the topic.

I would like to add to previous info, that this plane is provided of WEP, according to official Nakajima documents:

Looks like your usual great work, I've downloaded it, but haven't "flown" it yet. More feedback to come.

The Chart in the quote above (I didn't repeat the chart to save space) shows the information for various versions of the Sakae engine. I believe they are the same versions of the engine that the A6M Zeros used. Could this chart be to enhance the performance of the A6M Zeros & the other Ki-43 Hayabusas?

To further the argument that the A6Ms and the Ki-43s may be under performing in the Sim, I offer the following:

Saburo Sakai in his book "Samurai" commented that the Zero (A6M2-21), using "over boost", was faster in level flight than the P-40's he was fighting and was the equal of the P-39s he fought. All the statistics I can find show that the P-40s and the P-39s were faster than the Zero, but it's hard to argue with someone that fought them in combat. I have come to believe most of the performance statistics for most of the Japanese planes were based on military, not "over boost", power. After the war tests of several the late model Japanese fighters showed much higher performance than usually quoted. For example the Ki-84 is normally quoted as having a top speed of 388mph, but under US post war tests it achieved 427mph, quite a difference!

I'm not trying to hijack this thread, but I know you do great work with FMs and could possibly correct this apparent deficiency. This is just a suggestion.

Could this chart be to enhance the performance of the A6M Zeros & the other Ki-43 Hayabusas?

To further the argument that the A6Ms and the Ki-43s may be under performing in the Sim, I offer the following:

Saburo Sakai in his book "Samurai" commented that the Zero (A6M2-21), using "over boost", was faster in level flight than the P-40's he was fighting and was the equal of the P-39s he fought....For example the Ki-84 is normally quoted as having a top speed of 388mph, but under US post war tests it achieved 427mph, quite a difference!

Hi and thanks for your comments: much appreciated.

Chart shown, as all material gathered to model this aircraft, is an objective source of information. Everything subjective (like statements of a pilot) have not been taken in account. This is my way to approach this hobby, perfectly shared with Spitwulf, who sole made possible the making of this aircraft. So we put in historical data, picked from reliable sources; how these are managed by game engine and what about competitors like P-40 and P-39, are arguments of different threads. I can only add that only original sources have been used, since it is well known, like in the instance of Ki-84, that superior US fuels and lubricants allowed in late or post-war tests far higher performance of Japanese planes.

Personally, I flew many missions with this fighter, and found it, as modeled, competent against its main adversaries, being able even to shot down a B-24, although not alone but by a good teamwork with flight mates. Since I use the bit less powerful Ho-103, it is a nice achievement and much fun to reenact in game what few bold pilots did in RL.

I appreciate your reply and the explanation. I also understand you wanting to be objective and basing your work on reliable sources. Personal accounts are subjective and very difficult to quantify. I applaud your discipline and that adds to the integrity of your work!

Maybe what Saburo Sakai observed could also be explained by a performance test of the P-40E by Australia. It was a comparison test of the P-40E, P-39D and their new Boomerang fighter. The P-40E tested achieved a maximum of only 320 mph which is substantially below the published figure 354 mph.

I still haven’t been able to “fly” your creation as my X-52 flight system is having some problems making “flying” difficult.

Hayabusa II appeared in late 1942 in an initial version, sort of transition between previous Ki-43-I and definite model two. Distinctive features of this very early model were retaining of Mk.I wing (span 11.437 m; area 22.000 sq.m) as well as of circular oil cooler.

At first, big thanks for your work!

Please, can you give me any link on info about Ki-43 II with kI-43I wings? I can't find anything about it...In all books I have Ki-43II Early have standart Ki-43II wings...

Kagero Top Drawings 5 - Nakajima Ki-43 Hayabusa:

Aero Detail 29 - Nakajima Ki-43 "Oscar" Hayabusa:

Sorry for non standart view of links - sas1946 works badly on my computer now and i can't give them in normal view...